Of course there are other worthy causes you could donate to, but a good charity is one that puts the highest percentage of money raised into its programs, not its overhead (75 percent is a good benchmark).
Partners in Health, American Red Cross and The Nature Conservancy are examples of organizations that all score well for being effective as well as efficient, according to Charitynavigator.org, a Web site that tracks the budgets and programs of more than 5,000 charities worldwide.